Lenovo ThinkPad E450, E455 – How to test the battery charger – How to remove the battery – How to test the battery pack – How to reset the Laptop – Laptop repair and service

Category:Laptop Repair and Service

Contents of this article

How to test the battery pack

How to reset the laptop

How to disconnect the battery

Lenovo ThinkPad E450, E455

Power system checkout
To verify a power symptom, do the following:
1. Turn off the computer.
2. Connect the ac power adapter.
3. Turn on the computer. If the computer can be turned on, it means that either
the battery pack or the ac power adapter is functional.
4. Insert a straightened paper clip into the emergency reset hole to reset the
computer. If the computer is still powered on, it means that the ac power
adapter is functional.
5. Turn off the computer.
6. Disconnect the ac power adapter and turn on the computer. If the computer
can be turned on, it means that the battery pack is functional.
If you suspect a power problem, see the appropriate one of the following power
supply checkouts:
“Checking the ac power adapter”
“Checking the built-in battery and operational charging”
“Checking the coin-cell battery”

Checking the ac power adapter
You are here because the computer fails only when the ac power adapter is used.
If the power problem occurs only when the docking station or the port replicator
is used, replace the docking station or the port replicator.
If the system status indicator does not blink three times when an ac power
source is connected, check the power cord of the ac power adapter for correct
continuity and installation.To check the ac power adapter, do the following:
1. Unplug the ac power adapter cable from the computer.
2. Measure the output voltage at the plug of the ac power adapter cable. See
the following illustration:

Note:Output voltage of pin 2 of the ac power adapter might differ from
the one you are servicing.

3. If the voltage is not correct, replace the ac power adapter.
4. If the voltage is acceptable, replace the system board.Note:Noise from the ac power adapter does not always indicate a defect.Checking the built-in battery and operational charging
This computer supports only batteries specially designed for this specific
system and manufactured by Lenovo or an authorized builder. The system does not
support unauthorized batteries or batteries designed for other systems. If an
unauthorized battery or a battery designed for another systems is installed,
the system will not charge.
To check for detailed battery status information, do the following:For 7: Open the Power Manager program and click the Battery tab.For 8.1: Open the Lenovo Settings program and click OK.
To check whether the battery charges properly during operation, do the
following:
1. Discharge the battery until the remained battery power is less than 50%.
2. Connect the computer to ac power to charge the battery. If the battery
status icon in the Windows notification area indicates that the battery is not
charging, remove the battery and let it return to room temperature.
3. Reinstall the battery. If the battery is still not charging, replace the battery
pack.
4. Check the battery status icon again. If the same error still exists, replace
the system board.

Checking the coin-cell battery
To check the coin-cell battery, do the following:
1. Disconnect the battery connector.
2. Remove the coin-cell battery.
3. Measure the voltage of the coin-cell battery. See the following illustration.

If the voltage is correct, replace the system
board.

If the voltage is not correct, replace the coin-cell battery.
If the coin-cell battery discharges quickly after replacement, replace the system
board.

Performing a recovery operation
This section provides instructions on how to perform a recovery operation using
the Rescue and Recovery program.
1. From the Windows desktop, click Start >All Programs >Lenovo
ThinkVantage Tools >EnhancedBackup and Restore. The Rescue and Recovery program opens.
2. In the Rescue and Recovery program main window, click the Launch advanced
Rescue and Recovery arrow.
3. Click the Restore your system from a backup icon.
4. Follow the instructions on the screen to complete the recovery operation.

Resetting your computer to the
factory default settings
If you want to recycle your computer or just start over, you can reset your computer
to the factory default settings. Resetting the computer will reinstall the
operating system, reinstall all the programs that came with your computer, and
reset all the settings to the factory default settings.Attention: If you reset the computer to the factory default settings,
all your personal files and settings will be deleted. To avoid data loss, make
a backup copy of all the data that you want to keep. To reset your computer to
the factory default settings, do the following:
1. Move your pointer to the top-right or bottom-right corner of the screen to
display the charms. Click Settings >Change PC settings >Update
and recovery >Recovery.
2. In the Remove everything and reinstall Windows section, click Get
started. Then click Next to confirm the operation.
3. Depending on your needs, do one of the following:
To perform a quick format, click Just remove my files to start the
process. The process will take several minutes.
To perform a complete format, click Fully clean the drive to start the
process. The process will take several hours.
4. Follow the instructions on the screen to reset your computer to the factory
default settings.

Disconnect the battery
Before replacing any FRU, ensure that you have disconnected the battery by
doing the following:
1. Loosen the screws 1, and then remove the base cover 2 3.